.m-nav {
    position: relative;
    overflow: hidden;
    height: 300px;
    background-color: #9DC3E6;
}
.m-nav-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.m-nav-inner>.item {
    display: none;
}
.m-nav-inner>.item.active{
    display: block;
}
.u-indicator {
    position: absolute;
    display: flex;
    left: 50%;
    bottom: 10px;
    transform: translateX(-50%);
    padding: 0;
    list-style: none;
}
.u-indicator>li {
    flex: 1;
    width: 10px;
    height: 10px;
    list-style: none;
    border-radius: 5px;
    background-color: black;
}
.u-indicator>li+li {
    margin-left: 5px;
}
.u-indicator>li.active {
    background-color: white;
}